(click graphic to enlarge)

To move the whole figure:

In P6, from the Window menu make sure that 'Paramiter Dials' is enabled. At the top of your document (scene) window you will see two drop down menus, from the left menu select the figure you want to work on, eg 'Figure 1', from the right menu select 'Body',  form the paramiters pallet use the xTran and/or zTran dials to move the figure. See above graphic.

To move a figure that already has an animation applied to it:

In frame one, load a Poser square primitive, use 'Set Figure Parent' from the 'Figure' menu to parent the figure to the square, move the square so that the figure is in the desired start position for the animation, from the square's 'Properties' menu turn off its visibility. Run the animation, if necessary adjust the position of the square, but in frame one only.