When US assets are more attractive to foreign investors, what happens to the demand for dollars vs demand for a foreign currency?

When US assets are more attractive to foreign investors, what happens to the demand for dollars vs demand for a foreign currency? Demand for US dollars increases (demand curve shifts) At a Phoenix game, 150,000 tickets were sold at $45 a piece, the game was sold out, and some people didn"t get tickets. This says what about the selling price and equilibrium?