Hello Smita 
See you really need to mention your category because it depends a lot on it.
But, if you are from the general category, it is really hard for you to get admission into the NITs or IIITs through JEE Mains.
You should try for some private colleges.

Respected sir,

let me clear you

if you are general and you are getting 84 marks you had not qualified JEE mains exam

if you are OBC and you are getting 84 marks you had just qualified the exam

if you are SC and you are getting 84 marks you had qualified the exam as well as you might get some NIT college

if you are ST and you are getting 84 marks you had qualified JEE and you will get a good college.

Thank you.

Sorry to say we are unable to answer your query please ask your detailed question ( Which category you belong ), we will be happy to help you out.

Visit the below-provided link to check previous year cutoff rank for various NITs:-

Https://engineering.careers360.com/articles/jee-main-cutoff

All the very best and good luck.

Hi Smita,

         Firstly the cutoff is needed to predict the college that you might get. If you qualify then you will be giving jee advanced. But if you dont you will have to go for the counselling of jee mains and you can know your rank by : 

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