Don't change more than one thing at a time. First, try adding the flaps a few seconds earlier. See what that does. Not enough? Turn base later next time by a few seconds. Keep making tiny changes until you are within the 200' range. Remember that it's generally OK to land a little bit far, but any amount short is an un-sat, so always err on being higher! And don't forget to modify your pattern for any crosswind, which will definitely change things up. Good luck.