Pixar’s “Finding Dory” floated atop the box office over the weekend, taking in $73 million and sinking the sequel to “Independence Day,” industry results showed Monday. “Dory,” voiced by Ellen DeGeneres, follows a forgetful fish on a quest to find her parents, much as she did as a supporting character in the 2003 animated hit … Continue reading ‘Finding Dory’ Splashes Box Office Competition