R. J. Reynolds Industries reported sharply lower full-year and fourth-quarter net income. The tobacco and food industry conglomerate, which sold its service systems unit early in 1985, noted that when discontinued operations were excluded its net income for the full year and fourth quarter of 1984 was sharply lower. Reynolds Chairman J. Tylee Wilson said the results reflected good performance by all units of the corporation. Wilson said improved earnings reflected better sales and margins in its domestic and international tobacco business. He also cited a continued strong performance by the firm's Del Monte unit and by Heublein and Kentucky Fried Chicken.