Shareholders of Amfac Inc. of San Francisco...

Shareholders of Amfac Inc. of San Francisco approved a $49-a-share cash buyout valued at $920 million by Chicago-based JMB Realty . . . Tenneco Inc. of Houston said it has received $3.2 billion from the sale of certain Tenneco Oil Co. properties, thus satisfying the condition of its cash tender offer for 18 million shares of the company’s common stock . . . Tiffany & Co. adopted a stockholder rights plan designed to assure that all Tiffany stockholders would receive fair and equal treatment in the event of a takeover.