Hi Vishal,
Generally, schools look at 80 percentile in each section and overall as a decent benchmark. Your overall score is 88 percentile, which means it is 690 (?) and if you have 73 percentile in Verbal, then you must have a good percentile in Quant (Are you an Indian student per chance?

)I would suggest you try and improvise on your score, ONLY if you are looking at the top 10 schools. A lot of other factors - Work Ex., Education etc. - need to be considered before you should do this, as they contribute in equal weightage to your overall candidacy at a B School.
However, for the top 10, 80 percentile in each section (maybe 78-79 as well) is the least benchmark you should set to be safely considered.
Hope this helps.
Regards,
Ankit
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