Catalysis of the reaction: (R)-3-hydroxytetradecanoyl- + UDP-N-acetylglucosamine =  + UDP-3-O-(3-hydroxytetradecanoyl)-N-acetylglucosamine.
(R)-3-hydroxytetradecanoyl-acyl-carrier-protein:UDP-N-acetylglucosamine 3-O-(3-hydroxytetradecanoyl)transferase activity