I have a tummy tuck and breast augmentation in about 9 days, but platelet count is high, advice?

Your tests indicate your platelet levels are slightly above normal.  I encourage you to discuss the situation with your surgeon who will determine what the next step will be.  It may be as simple as a repeat of the test.

Your levels are just above normal.  The cause may be innocuous such as following a cold or flu or may be more serious.  A hematology consult would be recommend to be sure it is fine to proceed. 

Although your raised platelet count might not be a problem I would recommend that you talk to your plastic surgeon. He/She might want a hematologist to look at this and give advice. A second test might come back normal.