Paying down a balance isn't going to reduce your score unless you pay your only installment loan or your only revolver w/ a balance down to zero. The 6 points you lost are due to something else that happened concurrently. The causes of small drops like that are often hard to pin down, but if you want to let us know which bureau, model, and version of score you're looking at and the details of your profile (what accounts you have, dates opened, balances & limits, any baddies, etc.), we can help you look into it a little further.
