Canadian Grocer Loblaw Sales Up 6 Pct.  TORONTO (Reuters) - Loblaw Cos Ltd. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=L.TO target=/stocks/quickinfo/fullquote"&gt;L.TO&lt;/A&gt;, Canada's  largest grocery store chain, reported a higher third-quarter  profit on Friday, as stronger sales in non-food categories  helped boost overall sales by 6 percent.