Length of board is consisted of a few variables- Riders Weight, Riders length preference, wave size, wave shape etc.
In a nutshell, you dont weigh very much and the 5"4" Dom will be great for you. If you have other riders pushing the 200 lb mark maybe consider the 5'8". If you have a heavy rider surfing too small of a board, the board will tend to sink or pearl and won't get enough drive and push from the wave.
I would recommend the 5'8" if you want a board that has the ability to fit larger riders and will still provide you with a high performing board to do airs, spins etc.
In most scenarios when I am selling, after you grow out of a HL Broadcast or LF fish or something similar, personal preference takes over. If you havent ridden enough to have a preference, you will find out what you like after racking up some hours on the lake this summer and riding other boards.