with such good marks I think you'll be able to get a seat in a average NIT but you might not be able to get CSE/IT/ECE as there cut offs are usually high , though the admissions are based on your rank only and ranks are subjected to change as they depends upon various factors like number of applicants fill the form, number of applicants finally appeared in the exam, number of questions asked in the exam, difficulty level of the exam, performance of the candidate, previous year's cut offs trends availability of seats in the institution. So we can't be sure about the result before the announcement of cut offs and result by the official councel. So wait a little bit the results are going to release tomorrow. By then you may check you rank with the help of jee main rank predictor and also can check what colleges you might get based on your rank I am providing you the link for both. 

https://engineering.careers360.com/jee-main-rank-predictor

https://engineering.careers360.com/jee-main-college-predictor

It depends on which category  

If you belong to

OBC : you can easily get into desired iit or NIT

General category : it would be difficult to get in NIT (also it depends on the cut-off marks )