Lots of good comments above. You say you have concerns about his concentration and focus - yet this report is not negative about his behaviour. That aspect is fantastic, make sure you show him how pleased you are with that.
As to his attainment, and it being upsetting - is this partly because, no matter how much you've been discussing with the teacher what the difficulties are and trying to support them over the year, it is really quite distressing to have something put down on paper in black and white. Almost makes it "real" in a way it wasn't before.
Children respond remarkably strongly to "how good they think they are". So I would be very careful about the language you use around his areas of difficulty. Try to avoid "you are bad at maths" for example, perhaps "your counting is really good and I think you're going to be really good at "X" soon too". A combination of praise for what he can actually do, and positive expectations about the next step. His teacher may be able to help you work out the best things to support him on over the summer, I absolutely agree that skills that can be practised in games or shopping or cooking or trips out are going to be the most useful.
With regards to tutoring, I don't throw my hands up in horror at the idea of a 6/7 yr old having a tutor - my mother was a private remedial teacher and while she didn't take a lot of kids this age, if there was a particular issue she could make a lot of difference quickly, to allow them to catch up and progress rather than falling behind. It wasn't unusual for her to teach a child for a term or two, or longer, then have them back a few years later to help learn skills in secondary school. BUT you need a good tutor with appropriate experience who can see what your son needs help with and has a range of strategies to use. My mother also often came across children who had had a tutor for X years and it wasn't helping - because that tutor was inexperienced with children having difficulties and just tried to present more of the same as they would get in school, without understanding how to break it down further or look at it from a different direction or whatever. An inexperienced tutor may be great to help a child who has missed school work through illness or moving around or whatever, and just needs 1-1 time to catch up.
Tell your son he's brilliant and going to be brilliant, and then have a great summer holiday exploring all the things he can do.