The following code should fix things up but you will have to find what file to edit. Remember to save this editted file in the proper CUSTOM dir.
Note: the Red border is just so you can see what is going on. Remove when satisfied.
Code:
<!--bof Attributes Module -->
<div id="productAttributes" style="width:350px; border:1px solid red">
<h3 id="attribsOptionsText">Please Choose: </h3>
<br />
<div class="wrapperAttribsOptions">
<h4 class="optionName back"><label class="attribsSelect" for="attrib-4">Paint Style</label></h4>
<div class="back">
<select name="id[4]" id="attrib-4">
<option value="14">regular</option>
<option value="15">UV Paint Heads ( +$9.99 )</option>
</select>
</div>
<br /><br /><br />
</div>
<div class="wrapperAttribsOptions">
<h4 class="optionName back"><label class="attribsSelect" for="attrib-3">Guide Package</label></h4>
<div class="back">
<select name="id[3]" id="attrib-3">
<option value="8">(none)</option>
<option value="9">Guide Package - 10 dozen ( +$515.00 )</option>
</select>
</div>
<br class="clearBoth" />
</div>
</div><!--eof Attributes Module -->
<br class="clearBoth" />
<!--bof Quantity Discounts table -->
Another method is to play around with the CSS Selectors being used; try to get some float left & right going on with specified width values for each.