You have a strong GMAT score, although if you believe you can improve your score by 40+ points it may be worth taking a second time. Your score is self-reported on your application, so admissions teams will only focus on your highest score.
Regarding your application, admissions teams are not just looking for candidates with strong numbers- they are looking to cultivate leaders. I recommend you read this case study of an engineer who was accepted into Columbia, Tuck, and MIT:http://www.stacyblackman.com/comprehens ... ies/case2/
Conrad and the Stacy Blackman
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Stacy Blackman | Stacy Blackman Consulting Inc | http://www.StacyBlackman.com | +1 323.934.3936
MBA blogger, US News and Author, The MBA Application Roadmap