Profile Evaluation

Academics :
SSC-79.6%
HSC-74%
B.E.(MECHANICAL)- 61.6%

7.5 years of experience in Automotive Industry . Currently working in Honda Motorcycle from past 2.5 years
Handled diverse profile which includes Production, New Model Development and Market Quality

Currently I have scored 640 in GMAT and aiming for IIM -Indore/Lucknow

Please suggest should i proceed or retake GMAT

And how to improve my chances of selection