Was that 72% on the November mocks, or the more recent one? Either way that's a fantastic score and if she's already achieving that highly, then she should be absolutely fine in the exam.
I imagine that they are now focused on the more difficult, problem-solving type questions in lessons, because those are the ones where most students lost marks and need work on.
The thing to get her head around with these questions is understanding that mathematicians don't expect to be able to solve problems instantly. Even maths teachers look at these problems and have to think about them a bit first, maybe do some jottings on paper before they can see the right approach to take. They will normally be more than 1 mark and so instead of looking at a question, panicking and thinking 'I don't know how to do this' she needs to look at it, take a deep breath and say 'what sorts of things can I do that might get me a few marks on this question and maybe the right answer'?
So if there's a tricky angles question - I can't find the angle that I want, but what angles can I find and do they help? If it's a curve, what if I find the area underneath? If it's a horrible algebraic fraction, what if I manipulate it a bit, will it look any better?
She already has an excellent knowledge base, so any marks gained on these last few questions will be a bonus, not a necessity.
Also, if panic is a real issue, investigate meditation apps, relaxation techniques and rescue remedy.