Hello studnet. Here are the cut offs for various categories for jee mains 2020:

Common Rank List (CRL)/ General Category           90.3765335

Economically Weaker Sections (EWS)                       70.2435518

Other Backward Class (OBC-NCL)                              72.8887969

Scheduled Castes (SC)                                                 50.1760245

Scheduled Tribes (ST)                                                   39.0696101

People with Disability (PwD)                                        0.0618524

Since you have applied to ews and ews cut off percentile is 70.24, and you have got 72 percentile. You can give jee advanced exam. (IIT)