Hello .
for having admission in NIT when I am not considering any branch and the name of  NIT then one must have at least in 96 percentile in  JEE mains,
I hope you got it.
For knowing more about percentile vs marks you can go on the below link:
https://engineering.careers360.com/articles/jee-main-marks-vs-percentile
For predicting colleges you can use our college predictor tool from the below link:

JEE Main College Predictor 2020 - Predict Colleges ba ...

JEE Main College Predictor – Know your College Admission Chances Based ...

Best of luck.