tricks of a coma

1. He stood in silence with his hands akimbo, looking far off to the horizon.

2. He stood in silence with his hands folded close to his chest.

Are these sentences correct? Is it okay to use a coma in the first sentence? Will the meaning of this sentence change if I drop the coma?

Thanks

By 'coma', I take it you mean 'comma'.

1. Strictly speaking, the comma is not necessary but quite commonly placed.
    However, it must be there if the sentence is rewritten as
    Looking far off to the horizon, he stood in silence with his hands akimbo. 

Both sentences are correct but the positions of his hands are not the same.

Hi,
Your hands are on the end of your arms, below your wrists.

Best wishes, Clive