In addition to your GMAT score, an admissions team is going to be looking at your work experience, personal essays, letters of recommendation, and undergraduate record. Your GMAT score will certainly not hurt your candidacy.
On a similar note, you should understand how an admissions team sees your GMAT score. Your GMAT score is self-reported on your application, so an admissions team will only focus on your highest score. For this reason, if you believe you underachieved on your test and can score 30+ points higher, there is not a downside to retaking the test (other than the cost of the test).
However, your GMAT score is around the averages of the schools you are looking to (http://www.manhattangmat.com/gmat-mba-p ... chools.cfm
), so it will certainly not hurt your application.
Hope this was of help.
Conrad and the Stacy Blackman
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MBA blogger, US News and Author, The MBA Application Roadmap