The world\'s biggest food group, Nestle, has raised its sales growth outlook for the year after a better-than-expected performance in the first nine months.Underlying sales from January to September rose 7.3% on a year ago, helped by higher prices and strong demand in emerging markets.Nestle said it now expected in 2011 to \"slightly over-perform\" against its long-term organic growth range of 5-6%.Nestle\'s brands include Nescafe, KitKat and Perrier water.Sales in Europe over the first nine months grew by 3.8% and sales in the Americas grew by 5.6%.Japanese electronics maker Sony has postponed launches of various products after flooding in Thailand disrupted production at its factories.