Hi guys,
I would like some advice please

I got a GMAT of 670 with V41 (92%) and Q40 (56%) and A.W.A 5.0.
I graduated business school from one of the top UK schools Lancaster University with an average grade of 66% which is about a 3.7 GPA. I had majors in Finance, Economics and Statistics all of which I got my highest grades (e.g Finance which is very very math i got 73% in my final year - equivalent to about a 4.3 GPA)
I am about to apply in R1 to HEC Paris, UCLA, Tepper (Or Georgetown or Mendoza), Virginia (or Cornell).
Even thought my GMAT is in the 80% range for these schools and my GPA is over the average you can surely agree my Quant score is a bit low. Do you recommend me re-taking the exam or focusing on the apps?
Please note, I will apply as Greek Citizen thus also being a diversity asset to the schools I apply to. Also note, my background is quite unusual with experience working for Microsoft and starting my own firms.