As a SC B.Tech fresher what will be a decent score to get call from IIMs?

Experienced Sir/Madam please reply asap. Thanks in advance <smiley data-src="/emoji/smiley.png" alt="smiley" title="smiley" class="emoji" data-sigil="lazyload emoji" data-cdn="sm"></smiley>

75+ Ppercentile

80+ to be safe