indenting in a table

i am using tables for layout and want to move the text away from the edge.
I am using "margin-left : 5px" however, if i read bobby and WCAG right, this
is not allowed.  by using an absolute size over realtive, i am not allowing
this to be resized.
would like guidance on this and also how do you feel if i rationalize the
inability to size by stating this is an example where i have used
stylesheets for structure to better postion the text regardless how the text
is resized.

thanks and as i drill down into this, because i see the  stylesheets that
are used by governement agencies as all over the place in applying relative
versus absolute.