You seem to have good work experience. You have an above average GPA in your undergrad and gradate courses which is fine. If you retake your GMAT and score around 700 , you will definitely make your profile stronger. However, if you are not too keen to retake it, I would suggest focus on strengthening other parts of your application. Effective and persuasive essays that showcase your candidacy in the best manner, outstanding recommendations, and a carefully crafted resume outlining your most significant accomplishment, should offset your average GMAT score. So your chances of admission to these schools , or any other school for that matter ,will depend on a stellar application package .
I hope it helped.
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