When the import of kiwi fruit was banned, consumers in the US had to pay $35 per case of kiwi fruit. As the world price is $20 and import is allowed into the US with a $5 tariff, US consumers would have to pay only $25 per case. The 28% drop in cost will increase demand and more of the fruit would be consumed in the US.
With time however, the world price would rise due to an increase in demand from the US. This would also lead to an increase in the price paid by the US consumer. Also, the price of local kiwi fruit grown in the US would drop as there is a decrease in consumption for the local fruit now that consumers can get the same at a reduced price from the international market.