Hello dear

For qualifying for jee advanced you need to pass jee mains with more than the cut off percentile and the cut off will depend upon the number of students writing exam and difficulty level of exam and number of students they allowed to give jee advanced.

It is not necessary that jee advanced will be of 372 marks only because in 3-4 years ago the jee advanced is not of 372 marks and pattern is also different.

So be prepare for every thing and about the qualifying in jee advanced there are a number of factors which will decide the cut off marks like difficulty level of exam , number of seats available , no.  Of Candidates giving exam etc.

But I would suggest you to do your best and score minimum  50% marks to be in a good position.

Good luck