Based on boiling 6.75 gallonsliters at 1.068 for 75 minutes, this will decrease your wort by 1.25 gallonsliters, bringing your after boil OG to 1.081. You wanted an OG of 1.084. It looks like it will be under.
Fantasic beer! Great mouthfeel and super citrusy and hoppy. Just need to dial the bitterness back a touch.