Currently there are only workaround on how we can create a simple good old Pareto chart. There is no proper way to create one. Tableau has it. It is used when we are trying to look at Top X of some dimension. Lets say I want to see the top 10 cars in the world based on their average sales and how much do these top 10 cars contribute to the entire sale of all cars. This is currently only possible by workaround.
Link to a related community article: https://community.tibco.com/wiki/configure-combination-chart-pareto-chart