1st Runnings - 1.084 Pre-boil - 1.059 OG - 1.067 12/12 - Added dry hops. Gravity checked at 1.015 12/18 - Bottled ~4 gallons with 4.4oz Dextrose. ABV about 7%
Based on boiling 6.50 gallonsliters at 1.059 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.068. You wanted an OG of 1.066. It looks like it will be over.