If you get 75% in boards then you have cleared iit advance one criteria. Now comes the main thing which is rank and the cut off of rank for iit delhi is given in the link below,

https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-delhi

Since you have not mentioned the rank and not defined the exact parameter of good rank so we can't surely give the correct answer because you have not provided the information fully.

I can suggest you our college predictor tool which will show you exactly in which college you can get seat in,