German luxury carmaker Porsche reported disappointing figures on Friday as weak demand in China and the renewal of several popular models hit sales. Total deliveries in the first nine months of the year were 226,026 worldwide, a 7% drop. Sales in the vital Chinese market fell by 29% in the first nine months of the year, which the company said was due to the difficult economic picture in China. Porsche, a major brand in Germany’s Volkswagen Group, also sold 5% fewer vehicles in North America as customs delays hindered deliveries. One bright spot was the company’s home market in Germany, where d…