He felt like he was in a dream because he was surrounded by beautiful women.
「夢見心地」は、I feel like I am in a dream. や I felt dreamy. ということができると思います。
「彼は美女に囲まれて夢見心地だった。」は、He felt like he was in a dream because he was surrounded by beautiful women. と言えます。
ご参考になれば幸いです!