Hey Sandeep
92 percentile means 8%students are ahead / score more than you
Means out of nearly 8 lakhs student 64 thousand students score more than you.
Means your rank is nearly 64-70 thousand.
And with this rank it will be not possible to secure a seat in NIT SURATHKAL
And about marks : you can not calculate ma.rks from the percentile score because percentile is calculated from the number of students score more than you( even a single or 100 marks ) and total number of students.
So I would suggest to give next attempt.( April exam)
And try to secure 99+ percentile.
Good luck.

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