First of all im assuming that you meant NIT (National institute of technology) and not NIIT. Also, the jee main cutoff was 89 for this year. So the cutoffs for iits and nits would be obviously more than that so you have no chance here. In case you were talking about NIIT then you can find more information here- https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.niit.com/&ved=2ahUKEwjIreSDkv3hAhV66XMBHYlWDewQFjAQegQIAhAB&usg=AOvVaw0CKfIH7udRcc6N1T5TZjvA