Thanks for posting. Having a career in sales will not hurt your chances, but it will be important in your application to explain why you are interested in finance and what you have done (Ex: extracurriculars) to further your interest in this area.
Regarding MBA programs, do you have a preference in location? Because of your interest in finance, I recommend you consider schools in the North East that are close to New York.
I do not recommend you take the GMAT again, as you have a very strong score. Admissions teams are now going to be looking at other areas of your application, for example your work and extracurriculars. I recommend you read this case study of how one candidate addressed this in his application: http://www.stacyblackman.com/2011/07/28 ... ctivities/
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