Maximum Marks for JEE Advance are Not fixed for JEE Advance hence marks for each course also vary so no one can tell You regarding marks or Even Percentage because difficulty level is not fixed. We can only tell You regarding ranks Which You need to get IIT. Again It depends on Your course and also on Your category apart from Your PWD status. general there is No Particular Trend in PWE for courses, So if You belong to General PwD then within 200 ranks will be sufficient to get into IIT. 

To know rank Regarding specific rank as per Your category visit.

https://josaa.nic.in/webinfocms/public/view.aspx?page=46