Don't get too caught up in the numbers. The most important thing as a pitcher, is are you able to get hitters out consistently, thereby giving your team an opportunity to win when you are on the mound.
Not everyone is blessed with an arm that will produce 90 mph fastballs. Use your God given talents, work really hard on mechanics, location, breaking ball and change up. There are many pitchers who win consistently in MLB that never break 90 even at max velocity. Than again there are many who routinely bust mid-ninties and get lite up.
With hard work, good instruction and dedication you never know where you my end up.
Good luck