US/ Tesla Inc TSLA.O gained 4.6% after CEO Elon Musk sold $6.9 billion worth of company shares. By Bansari Mayur Kamdar, Medha Singh and Aniruddha Ghosh Aug 10 (Reuters) - Wall Street was set to open sharply higher on Wednesday after data showing a slower-than-expected rise in inflation last month prompted traders to cut their bets on a third straight 75-basis-point interest rate hike in September. Economists polled by Reuters expected the Consumer Price Index to show year-on-year headline inflation of 8.7%, far above the Federal Reserve's target of 2%, but lower than last month's 9.1%.