Siddhesh, 

There's was no such spot round for IITs .

Josaa declared that there will be no spot round for IIT. 

There was a spot round for NITs /GFTIs.

I will provide you the link where you can check the round 7 cut off---

https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/iits-cutoff-for-b-tech-electrical-engineering/amp&ved=2ahUKEwi33vvF46fhAhWGqY8KHQhxCrUQFjAAegQIBBAB&usg=AOvVaw13WYwUCKQcyoJuGqXdCj_l&ampcf=1