Parry said a move failed to materialise because the club decided to spend the money on two players rather than one.
Dabo, a full-back, becomes the club's third signing of the summer, with his move following a spell on loan in League One with Swindon last season.
Sanchez is out of contract at Arsenal next summer, and reports have linked him with both Bayern and Paris Saint-Germain.
Lukaku, who has two years remaining on his Everton contract, has been strongly linked with his former club.
Lyon president Jean-Michel Aulas has revealed that Arsenal are interested in signing Alexandre Lacazette, but would have to pay €65m to get him.
Everton have seen a £27 million bid for Swansea midfielder Gylfi Sigurdsson rejected, sources close to the Welsh club have told ESPN FC.