Credit score dropped and just looking for insight.

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Hey ladies and Gents, I've just paid off a car loan that had a 6 year term. The only thing is I paid it off 4 years early and apparently my credit score dropped from 715 to 712 on Credit Karma. I found out paying it off reduced my age of history. I have 2 other accounts open which are credit cards and I try to only do 30% of the utilization for both of them.Any tips on getting my score up (750+) because I'm trying to get prepared for a multi-family FHA with the best rates. Anyone with a similar scenario and what steps did you take.