Hello Sathya,

For percentile let say more than 90%ile, the person will be in a safer zone for getting into top NITs with a good branch. So, you needed to score a lot-lot better than what you have at least to get into the NITs. It is frankly not possible with this percentile.

Though it will be easier for one who is in category quota as well as availing state quota.

You can see last year cutoff from the following link -

https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-surathkal

Good luck!