Complex sentence: Nestlé acquired the United States rights to the brand in 1984, where it continues to produce the bar; the bar is produced by The Hershey Company in Smith's Falls, Ontario, Canada.
Split into simpler sentences: Nestlé acquired the United States rights to the brand in 1984, and continues to produce the bar. The bar is currently produced by The Hershey Company in Smith's Falls, Ontario, Canada.