Adarsh,
The ability to export a document from Laserfiche to SharePoint via workflow does not natively exist. You would either have to code up the export using an SDK Script activity or build a custom workflow activity to make it happen.
For those that do not have those capabilities we have developed a custom workflow activity that will allow you to export a Laserfiche document to a selected SharePoint site and library and set the appropriate SharePoint fields with document metadata.
Typically we would make the custom workflow activity available as a download from our website at http://qfiche.com/products but because there has been limited interest in this integration we have not publicly made it available.
If you would like to evaluate the SharePoint Export custom workflow activity please contact us at info@qfiche.com and we can make a fully functional 30-day demo available to you at no charge.