The 5 does not make sense as it is implied as part of the chord. An Em chord has E G B by default. BIAB, with a Jazz style will often add a 7th (D) and a 9th (F). If you want the Em chord without the 3rd (G), that is another story. Now Em7b5 and Em7#5 do specify what to do with the 5th but unless it is spelled out, the (perfect) 5th is implied.

If you a changing the key to the song, just use the transpose function. No need to replace everything.

Rachael