I think you made another error in typing "in the age" not "or the age"
"To reinvent oneself" means to change the way you do things. In the above example, because of the rising value of the rupee, it is more difficult to export goods because they become more expensive. Exporters in India cannot depend on the selling point of having the cheapest goods anymore. They must change their way (reinvent) of doing business. Perhaps by making a higher quality product to justify the increased price or offering some kind of after sales service.