may I get the nit with 72 percentile from SC category

You haven't mentioned the State you belong to. This is important because cut offs are different from Home State Students and other State Students. Please do help us with the State you belong to. Meanwhile,

Your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be  243322. Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100.

This rank is a little high for a seat in NIT. You may have to appear for April session. But you may get a seat under JOSAA Counselling for your home colleges. And unfortunately this score also might be less for qualifying for JEE Advanced as the expected qualifying percentile for JEE Advanced is 85 and above. Please visit our page for previous year cut offs of various NITs. https://engineering.careers360.com/articles/jee-main-cutoff

Now to predict colleges, please use our college predictor:

JEE Main College Predictor 2020 - Predict Colleges based on your JEE Main Rank

JEE Main College Predictor – Know your College Admission Chances Based on your Rank/Percentile, Home State, Caste, Gender, Exam Result & Get ...