hi yes packing up smoking would help but also a healthy life style eating the right foods keeping away from fast foods and junk foods sodas and not forgetting alcohol all would be a big help. get him out exercising brisk walking and swimming would help and be the best have a read up about maca will take a couple of months to work up to full strength but its said to help with count strength and mobility all the things your looking for. do hope all this helps. good luck
does quiting smoking-improve-semen-motility-and-morphality-levels-or-just-prevent-any-further-deterioration